Materials Literature
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Anodizing has proven an effective method for preparing bioactive titanium and has been the subject of many studies regarding the performance and biological characterization of the layers obtained. However, the fatigue behavior of titanium alloys, after undergoing this process is still poorly studied. This study aims t…
Abstract Raman spectroscopy is an indispensable tool in laboratories conducting research in the nascent field of carbon nanomaterials. It provides comprehensive information about the structure and layer thickness of graphene samples with high levels of sensitivity, stability, and control.
The Kapton 100HN polyimide films were aged under 3 kV ac voltage (50 Hz), and the aging evolution were studied by the Fourier transform infrared spectroscopy (FTIR) and the dielectric measurement. The FTIR spectra show that the ether linkage, and some of C-H bonds in aromatic rings and C-N-C bonds transverse stretchin…
Polyaniline (PANI) nanostructures encapsulated in highly ordered TiO2 nanotubes (NTs) array was obtained by formation of TiO2 NTs array in HF-H3PO4 solution using constant potential anodization method; followed by electropolymerization of aniline to be encapsulated in the TiO2 NTs array, The electrochemical, morpholog…
The frequency-dependent dielectric dispersion of ZnO–Na2O–Al2O3–B2O3 (in mol%) glass prepared by the melt quenching technique is investigated in the temperature ranges from room temperature to 420 K. Dielectric relaxation has been analyzed based on the behavior of electric modulus behavior. An analysis of the real and…
Due to its fingerprint specificity and trace‐level sensitivity, surface‐enhanced R aman spectroscopy ( SERS ) is an attractive tool in bioanalytics. This review reflects the research in this highly interesting topic of the last 3–4 years. The detection of the SERS signature of biomolecules up to microorganisms and cel…
On the basis of thermoelastic martensitic transformation involved, the mechanical behaviors of NiTiNb shape memory alloys were experimentally studied and their wide hysteresis effect was theoretically discussed. It was found that even at the same temperature NiTiNb shape memory alloys perform different mechanical beha…
Wavelet shrinkage is efficient for de-noising the partial discharge (PD) detection. An improved wavelet de-noising approach for PD online measurement is presented. The wavelet de-noising approach is based on a genetic adaptive threshold estimation (GATE) scheme. The thresholding functions with continuous derivatives a…
This work deals with pyrolysis decomposition of wood chips and the main components of wood by thermogravimetric analysis (TGA).Experiments were carried out in the inert atmosphere of nitrogen.The pyrolysis temperature range was varied linearly from 20 °C to 900 °C with the heating rate equal to 5 K min -1 to detect al…
High quality Bi1−xDyxFeO3 (0 ≤ x ≤ 0.15) ceramics have been fabricated by sintering Dy-doped BiFeO3 (BFO) precursor powders at a low temperature of 780 °C. The magnetic properties of BFO were improved by the introduction of Dy on the Bi-site. More importantly, well saturated ferroelectric hysteresis loops and polariza…
Metallicnanoparticles have been traditionally synthesized using wet chemical techniques,where the chemicals used are quite often toxic and flammable. In this research,we present a simple and ecofriendly biosynthesis of Ag nanoparticles using Ulvafasciata crude ethyl acetate extract as reducing and capping agent. The b…
Recent experiments [Yu et al., Nature Nanotech 5, 718 (2010); Tang et al., Nano Lett. 10, 4279 (2010); Hopkins etal., Nano Lett. 11, 107(2011)] on silicon based nanoscale phononic crystals demonstrated substantially reduced thermal conductivity compared to bulk Si, which cannot be explained by incoherent phonon bounda…
An accurate knowledge of several metal-boron phase diagrams is important to evaluation of higher order systems such as metal-silicon-boron ternaries. The refinement and reassessment of phase diagram data is a continuous work, thus the reevaluation of metal-boron systems provides the possibility to confirm previous dat…
Graphene oxide coated silica hybirds (SiO2-GO) were fabricated through electrostatic assembly in this work, then blended with poly(vinylidene fluoride) (PVDF) by solution mixing to make PVDF nanocomposites. The interfacial interaction was investigated by scanning electron microscopy (SEM), polarized optical microscopy…
New fully aromatic poly(phosphazene-aryl amides) were prepared by polycondensation reaction of our synthesized aromatic diamine: 1,1,3,5-tetraphenoxy-4,6-bis(4-aminophenoxy)oligocyclotriphosphazene (monomer 1) with terephthaloyl dichloride. Their chemical structure and composition were characterized by elemental analy…
editorial
The formation of intrinsic defects by ionizing radiation in some ionic crystals in the anion sublattice is only associated with the instability of the self-trapped exciton up to now. In this paper we propose a new mechanism for the formation of the defects in the anion sublattice associated with the Janh-Teller instab…
Exchange bias (EB) and the training effects (TE) in an antiferromagnetically coupled La 0.7 Sr 0.3 MnO 3 /SrRuO 3 superlattices were studied in the temperature range 1.8–150 K. Strong antiferromagnetic (AFM) interlayer coupling is evidenced from AC-susceptibility measurements. Below 100 K, vertical magnetization shift…
In contrast to the original Kohn-Sham (KS) formalism, we propose a density functional theory (DFT) with fractional orbital occupations for the study of ground states of many-electron systems, wherein strong static correlation is shown to be described. Even at the simplest level represented by the local density approxi…
Increasing production and application of nanomaterials raises significant questions regarding the potential for cellular entry and toxicity of nanoparticles. It was observed that the presence of serum reduces the cellular association of 20 nm carboxylate-modified fluorescent polystyrene beads up to 20-fold, relative t…